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Quizzes > Mathematics

Points Lines and Planes Practice Quiz

Quick quiz for naming points lines and planes. Instant results.

Editorial: Review CompletedCreated By: Daan KolkmanUpdated Aug 24, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
paper cut points lines and planes shapes layered on coral background for geometry quiz

Use this quiz to practice identifying and naming points, lines, segments, rays, and planes, and see how they relate. For more basics, try the point line plane quiz. Build broader skills with a plane geometry quiz, or review fundamentals in a geometry chapter 1 quiz. Get instant feedback after each question to spot mistakes and strengthen core geometry ideas.

Which of the following best describes a point in geometry?
A segment with two endpoints
A flat surface extending infinitely
A line with infinite length
An object with no dimension
A point in geometry has no length, width, or height and only indicates a position. It is the most fundamental unit in geometry with zero dimensions. Points are often labeled with capital letters like A or B. .
Which best describes a line in geometry?
A straight path that extends infinitely in both directions
A point with no dimensions
A flat surface that extends infinitely
A part of a line with two endpoints
A line in geometry is one-dimensional, extending without end in both directions. It consists of infinitely many points collinear along its path. Lines are named using any two distinct points on the line or with a lowercase letter. .
Which of the following best describes a plane?
A flat surface that extends infinitely in all directions
A line segment with two endpoints
A one-dimensional path that extends infinitely
A point with zero dimensions
Planes are two-dimensional flat surfaces that extend infinitely in length and width. They consist of infinitely many lines. A plane can be named by three non-collinear points or by a single script letter. .
Three points are considered collinear if they...
Lie on the same line
Form a right angle
Are vertices of a triangle
Lie on the same plane
Collinear points lie on the same straight line. If three points are on a single line, they are collinear. This property helps in testing alignment of points in geometry. .
What defines a line segment?
A single point in space
A flat surface extending in two directions
An endless line in one direction
A part of a line with two endpoints
A line segment is part of a line bounded by two distinct endpoints. It has a fixed length equal to the distance between these endpoints. Line segments are foundational in constructing polygons. .
What defines a ray?
A part of a line with one endpoint extending infinitely in one direction
A line extending infinitely both ways
A flat surface with one boundary
A segment with two endpoints
A ray starts at an endpoint and extends infinitely in one direction. It contains infinitely many points beyond the starting point. Rays are used to define angles. .
Two lines in the same plane that never intersect are called...
Parallel
Perpendicular
Skew
Coplanar
Parallel lines lie in the same plane and never intersect regardless of how far they are extended. They maintain a constant distance apart. Recognizing parallel lines is essential in many geometry proofs. .
Two lines that intersect at a right angle are called...
Parallel
Concurrent
Perpendicular
Skew
Perpendicular lines intersect to form right angles (90°). They meet at exactly one point and create four right angles at the intersection. Perpendicularity is a key concept in many constructions and proofs. .
Are the points A(1,2), B(2,4), and C(3,6) collinear?
No
Yes
Only A and B are collinear
Only B and C are collinear
To determine collinearity, compare slopes of segments AB and BC. Slope AB = (4?2)/(2?1) = 2, and slope BC = (6?4)/(3?2) = 2. Since the slopes are equal, all three points lie on the same line. .
The intersection of two distinct planes in three-dimensional space is...
The empty set
A plane
A line
A point
When two distinct planes intersect in 3D space, their intersection is a line. This line is common to both planes and extends infinitely. It can be found by solving the two plane equations simultaneously. .
Which set of points is coplanar?
A(-1,0,0), B(0,-1,0), C(0,0,-1), D(-1,-1,-1)
A(0,0,0), B(2,0,0), C(0,3,0), D(5,5,0)
A(0,0,0), B(1,1,1), C(2,2,2), D(3,3,4)
A(1,0,0), B(0,1,0), C(0,0,1), D(1,1,1)
Coplanar points lie on the same plane. All given points have z-coordinate equal to zero, so they lie in the plane z=0. Any set of points with the same constant z-value is coplanar. .
How many distinct planes can be determined by a line and a point not on that line?
One
None
Two
Infinitely many
A line and an external point define infinitely many planes because you can rotate a plane around the line through the point. Each such plane contains the line and the given point. This rotation yields an uncountable number of distinct planes. .
If two lines are skew, they...
Intersect at a right angle
Never intersect and are not coplanar
Lie on the same plane
Are parallel and coplanar
Skew lines are not parallel and do not intersect, and they are not in the same plane. They exist in three-dimensional space, unlike parallel lines which lie in the same plane. Skew lines can be recognized by their non-coplanarity and lack of intersection. .
What is the distance between points (x1,y1) and (x2,y2) in the coordinate plane?
?[(x2?y1)^2+(y2?x1)^2]
|x2?x1|+|y2?y1|
[(x2?x1)+(y2?y1)]/2
?[(x2?x1)^2+(y2?y1)^2]
The distance formula between two points derives from the Pythagorean theorem. It calculates the length of the hypotenuse of a right triangle formed by the horizontal and vertical differences. This yields ?[(x2?x1)^2+(y2?y1)^2]. .
What is the midpoint of the segment with endpoints (2,3) and (4,7)?
(6,10)
(4,3)
(2,7)
(3,5)
The midpoint formula averages the x-coordinates and the y-coordinates of the endpoints. Midpoint = ((2+4)/2, (3+7)/2) = (3,5). This point is exactly halfway between the two endpoints. .
Three planes in space can intersect in which of the following ways?
A single point
All of the above
A line
A plane
Three planes can intersect in various ways: all three can share a single common point, two planes can intersect along a line and the third plane intersect that line at a point, all three can coincide in a plane, or they may have no common intersection. Hence, all of the above are possible. .
What is the equation of the line with slope 3 passing through the point (1,2)?
y = (1/3)x + 5/3
y = -3x + 8
y = 3x + 1
y = 3x - 1
Using the point-slope form y?y1=m(x?x1), we get y?2=3(x?1). Simplifying gives y=3x?3+2 or y=3x?1. This slope-intercept form matches y=3x?1. .
What is the measure of the acute angle between the lines y = 2x + 1 and y = -1/2x + 3?
45°
30°
60°
90°
The angle between two lines with slopes m1 and m2 is arctan(|(m1?m2)/(1+m1m2)|). Here m1=2 and m2=?1/2 gives denominator zero, implying the lines are perpendicular. Perpendicular lines meet at 90 degrees. .
Are the points A(1,2,3), B(2,3,4), C(3,4,5), and D(4,5,7) coplanar?
Only B, C, and D are coplanar
Yes
No
Only A, B, and C are coplanar
Compute vectors AB=(1,1,1), AC=(2,2,2), and AD=(3,3,4). If D lay in the plane of A, B, and C, AD would be a linear combination of AB and AC. Since it is not, the volume formed by these vectors is nonzero, so the points are not coplanar. .
If a line is perpendicular to two distinct lines in a plane, then the line is perpendicular to...
The plane containing the two lines
Any line not intersecting the plane
Any line parallel to the plane
Only one of the two lines
A line perpendicular to two distinct lines in a plane is perpendicular to the plane itself. This follows because those two lines span the plane. Such a line meets the plane at a right angle. .
Given the line x=1+2t, y=2+3t, z=3+4t and the plane x+y+z=6, the parameter t at the intersection point is...
-1
0
1
2
Substitute x=1+2t, y=2+3t, z=3+4t into x+y+z=6 gives (1+2t)+(2+3t)+(3+4t)=6, so 6+9t=6 and t=0. Hence the intersection occurs at t=0. .
If two lines are each perpendicular to the same plane, then the lines are...
Parallel
Coincident
Intersecting
Skew
Any two lines perpendicular to the same plane are parallel to each other. They have direction vectors both orthogonal to the plane's normal vector. Since they share the same direction, they never meet. .
Which formula gives the distance from a point (x0,y0,z0) to the plane Ax+By+Cz+D=0?
|Ax0+By0+Cz0+D|/(A+B+C+D)
?(Ax0+By0+Cz0+D)
(Ax0+By0+Cz0+D)/(A+B+C)
|Ax0+By0+Cz0+D|/?(A^2+B^2+C^2)
The distance from a point to a plane follows from projecting the point onto the plane along the plane's normal vector. The formula is |Ax0+By0+Cz0+D| divided by ?(A^2+B^2+C^2). This gives the shortest distance. .
Lines L1: x=1+2t, y=2?t, z=3+4t and L2: x=3+4s, y=5?2s, z=7+8s are...
Coincident
Parallel
Skew
Intersecting
The direction vectors (2,?1,4) and (4,?2,8) are scalar multiples, so the lines are parallel. Checking a point from one line does not satisfy the parametric equations of the other, so they are distinct parallel lines. .
Which equation represents the plane through points P(1,0,0), Q(0,1,0), and R(0,0,1)?
x+y+z=0
x+y+z=1
x?y?z=1
x+y?z=1
A plane through P, Q, R satisfies x+y+z=1 since substituting each point yields 1. This is the unique plane containing those three non-collinear points. No other constant fits all three points. .
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Study Outcomes

  1. Identify Points, Lines, and Planes -

    Recognize and define the fundamental elements of geometry, including points, lines, and planes, to build a solid conceptual foundation.

  2. Analyze Relationships -

    Examine how points, lines, and planes interact - such as parallelism, intersection, and collinearity - to understand their spatial connections.

  3. Apply Geometric Concepts -

    Use your knowledge of points, lines, and planes to solve practice problems and accurately model real-world scenarios.

  4. Interpret Spatial Configurations -

    Visualize and describe the arrangement of geometric figures in two and three dimensions to enhance your spatial reasoning skills.

  5. Evaluate Angles and Intersections -

    Determine angle measures and identify intersection points or lines in various geometric constructions with precision.

  6. Optimize Problem-Solving Strategies -

    Develop efficient approaches for tackling the point, line, and plane quiz challenges, reinforcing your mastery in geometry points, lines and planes practice.

Cheat Sheet

  1. Existence Postulates -

    Euclid's postulates tell us that through any two points there is exactly one line, and through any three noncollinear points there is exactly one plane. Remembering these helps in geometry points lines and planes practice, since every line or plane you draw must follow these unique existence rules.

  2. Dimensions Defined -

    A point has 0 dimensions, a line has 1 dimension, and a plane has 2 dimensions, as outlined by MIT OpenCourseWare. Use the mnemonic "PLP: Point-Line-Plane" to recall increasing dimensionality when doing a point line and plane quiz.

  3. Collinear vs. Coplanar -

    Points on the same line are collinear; points on the same plane are coplanar (Khan Academy). A simple trick: "coLINEar = sameLINE, coPLANar = samePLANE," which is super handy during geometry quiz practice.

  4. Intersections of Lines and Planes -

    Two distinct lines either intersect at a single point or are parallel, a line and plane intersect at exactly one point (unless parallel), and two planes intersect in a line (per Stewart's Calculus). Visual sketches in your geometry points lines and planes practice help cement these intersection rules.

  5. Segment Addition & Distance -

    The Segment Addition Postulate says if B is between A and C then AB + BC = AC. Coupling this with the Ruler Postulate's distance formula |x₂ - x₝| ensures you nail every lines and planes geometry problem involving measurements.

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